JPWO2016147708A1 - スクラバ排水の処理方法及びスクラバ排水の処理装置 - Google Patents
スクラバ排水の処理方法及びスクラバ排水の処理装置 Download PDFInfo
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Abstract
Description
ディーゼルエンジンの排気をスクラバにより処理し、濁度240NTU(ホルマジン)、浮遊物質濃度80mg/Lとなったスクラバ排水を準備し、凝集剤としてポリ塩化アルミニウム(PAC)を、浮遊物質質量に対して凝集剤質量が100:5となるように添加した。ジャーステーターにて150rpmの急速攪拌を20秒間、その後40rpmの緩速攪拌を20分間行い、排水を500mL容メスシリンダーに移した。処理速度の指標として、透明部分と懸濁部分の境界面の高さを経時的に測定した。また、処理水質の指標として、凝集沈降後、水面から2cmの位置でサンプリングを行い、ポータブル濁度計2100Q(HACH社)にて濁度を測定した。更に、凝集沈降後、デカンテーションにより上澄みを除去した残りをスラッジとし、赤外線水分計により含水率を測定した。
凝集剤としてポリ塩化アルミニウム(PAC)のかわりにポリ硫酸第二鉄(ポリ鉄)を用いた以外は、試験例1と同様にして、試験例2を行った。
上記スクラバ排水に、磁性粉として四三酸化鉄を、浮遊物質質量に対して磁性粉質量が1:1となるように添加した。ジャーステーターにて150rpmの急速攪拌を20秒行った後、500mL容メスシリンダーに排水を移し、そのメスシリンダーをネオジウム磁石の上に設置した。試験例1と同様に、透明部分と懸濁部分の境界面の高さを経時的に測定した。また、凝集沈降後、水面から2cmの位置でサンプリングを行い、濁度を測定した。更に、スラッジの含水率を測定した。
上記スクラバ排水に、磁性粉として四三酸化鉄を、浮遊物質質量に対して磁性粉質量が1:1となるように添加し、更に、凝集剤としてポリ硫酸第二鉄(ポリ鉄)を、浮遊物質質量に対して凝集剤質量が100:5となるように添加した。ジャーステーターにて150rpmの急速攪拌を20秒行った後、500mL容メスシリンダーに排水を移し、そのメスシリンダーをネオジウム磁石の上に設置した。試験例1と同様に、透明部分と懸濁部分の境界面の高さを経時的に測定した。また、凝集沈降後、水面から2cmの位置でサンプリングを行い、濁度を測定した。更に、スラッジの含水率を測定した。
何も添加しないスクラバ排水を対照例1とした。
図15には透明部分と懸濁部分の境界面の高さの結果を示す。図15に示されるように、対照例1や、凝集剤を添加した試験例1、2では、この試験時間内では界面の高さの下降がほとんど起こらなかった。これに対し、磁性粉を添加した試験例3や、磁性粉及び凝集剤を添加した試験例4では、4分間程度で界面がメスシリンダーの底付近に達し、磁気分離により凝集沈降が速やかに完了することが明らかとなった。
2:スクラバ
2a:給気口
2b:排気口
2c:排水口
2d:給液口
3、13:弁
4:測定タンク
5:pH測定装置
6:水質測定装置
7、7a、7b、:混合タンク
7c:混合配管
8:pH調整装置
9:磁性粉添加装置
10:凝集剤添加装置
11、11a、11b、11c、20、30、40、50、60、70:磁気分離装置
12:スラッジタンク
14:制御装置
15:撹拌装置
16:浮遊物
17:磁性フロック
21:流路
22:回転盤
23、33、42:スクレーパー
32、41:回転ドラム
71:スラッジ貯留配管
72:管路誘導ガイド
73:磁気発生ドラム
74:電磁石
L1、L1a、L2、L3、L4、L5、L6、L7、L8:配管
M:モータ
T:配線
Claims (13)
- 燃焼排ガスをスクラバで処理する際に生じるスクラバ排水に、磁性粉を添加して、前記スクラバ排水に含まれる浮遊物と前記磁性粉との結合物を形成せしめて、これを磁気分離して前記排水を浄化することを特徴とするスクラバ排水の処理方法。
- 前記スクラバ排水に、前記磁性粉とともに更に凝集剤を添加して、前記スクラバ排水に含まれる浮遊物と前記磁性粉との結合物を形成せしめて、これを磁気分離する請求項1に記載のスクラバ排水の処理方法。
- 前記スクラバ排水の濁度又は浮遊物質濃度について、浮遊物の除去処理を必要としない範囲Aと、磁性粉だけの添加で処理できる範囲Bと、磁性粉と凝集剤とを併用する必要がある範囲Cとを予め設定しておき、前記濁度又は浮遊物質濃度を測定して、前記濁度又は浮遊物質濃度が範囲Aにある場合はスクラバ排水をそのまま排水又は循環使用し、前記濁度又は浮遊物質濃度が範囲Bにある場合はスクラバ排水に磁性粉のみを添加して処理を行い、前記濁度又は浮遊物質濃度が範囲Cにある場合はスクラバ排水に磁性粉及び凝集剤を添加して処理を行なう、請求項1又は2記載のスクラバ排水の処理方法。
- 前記濁度又は浮遊物質濃度の範囲がB又はCにある場合の前記磁性粉の添加量及び/又は前記凝集剤の添加量を、前記濁度又は浮遊物質濃度に応じた量とする請求項3記載のスクラバ排水の処理方法。
- 前記範囲Aと前記範囲Bとの境界値が、濁度25〜100NTUの範囲で設定される請求項3又は4記載のスクラバ排水の処理方法。
- 前記範囲Aと前記範囲Bとの境界値が、浮遊物質濃度10〜50mg/Lの範囲で設定される請求項3又は4記載のスクラバ排水の処理方法。
- 前記範囲Bと前記範囲Cとの境界値が、濁度50〜150NTUの範囲で設定され、且つ、前記範囲Aと前記範囲Bとの境界値より25NTU以上大きい値とされる請求項5記載のスクラバ排水の処理方法。
- 前記範囲Bと前記範囲Cとの境界値が、浮遊物質濃度20〜100mg/Lの範囲で設定され、且つ、前記範囲Aと前記範囲Bとの境界値より10mg/L以上大きい値とされる請求項6記載のスクラバ排水の処理方法。
- 燃焼排ガスをスクラバで処理する際に生じるスクラバ排水に磁性粉を添加する磁性粉添加装置と、前記スクラバ排水に含まれる浮遊物と前記磁性粉との結合物を磁気分離する磁気分離装置とを備えることを特徴とするスクラバ排水の処理装置。
- 更に、前記スクラバ排水に凝集剤を添加する凝集剤添加装置を備える請求項9記載のスクラバ排水の処理装置。
- 更に、前記スクラバ排水の濁度又は浮遊物質濃度を測定する測定装置と、前記測定装置による測定値に応じて、前記磁性粉添加装置からの磁性粉の添加量を制御する制御装置とを備える請求項9記載のスクラバ排水の処理装置。
- 更に、前記スクラバ排水の濁度又は浮遊物質濃度を測定する測定装置と、前記測定装置による測定値に応じて、前記磁性粉添加装置からの磁性粉の添加量及び前記凝集剤添加装置からの凝集剤の添加量を制御する制御装置を備える請求項10記載のスクラバ排水の処理装置。
- 前記スクラバ排水の濁度又は浮遊物質濃度について、浮遊物の除去処理を必要としない範囲Aと、磁性粉だけの添加で処理できる範囲Bと、磁性粉と凝集剤とを併用する必要がある範囲Cとを前記制御装置に予め入力しておき、前記測定装置によって前記濁度又は浮遊物質濃度を測定して、前記制御装置に予め入力した範囲と対比し、前記濁度又は浮遊物質濃度が範囲Aにある場合はスクラバ排水をそのまま排水又は循環使用し、前記濁度又は浮遊物質濃度が範囲Bにある場合はスクラバ排水に磁性粉のみを添加して処理を行い、前記濁度又は浮遊物質濃度が範囲Cにある場合はスクラバ排水に磁性粉及び凝集剤を添加して処理を行なう、請求項12記載のスクラバ排水の処理装置。
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CN109699535B (zh) * | 2019-01-14 | 2023-11-17 | 乔静梅 | 一种活水养鱼系统 |
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